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County file — IA

Underground Storage Tanks in Sioux County, IA — 140 facilities, 61 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Sioux County, population 35,559.

140UST facilities
114tanks in service
321closed tanks
61leak records
0open cases
60no further action

Sioux County has 140 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 114 tanks in service and 321 tanks that have been closed or removed. Over the life of the program, 61 fuel releases were reported here; 60 (98% of records) were investigated and closed with No Further Action, and no cleanup cases remained open when the snapshot was compiled.

That works out to 32.1 tanks in service per 10,000 residents, well above the Iowa average of 22.3 per 10,000. Countywide numbers are context, not a verdict on any parcel — tank risk is hyper-local, falling off within a few hundred feet.

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Frequently asked questions

How many underground storage tanks are in Sioux County, IA?

The EPA UST Finder snapshot lists 140 registered UST facilities in Sioux County with 114 tanks currently in service, 321 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Sioux County?

61 releases from underground storage tanks are on record for Sioux County. 60 (98%) reached No Further Action status, while 0 cleanup cases remained open in the snapshot.

How do I check a specific address in Sioux County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Sioux County address to map every registered tank and reported leak within a mile, with distances in feet and an A–F screening grade. Verify current records with the Iowa DNR UST Program.

Verify with the state

The live regulatory record for any Sioux County facility or leak case is held by the Iowa DNR UST Program. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Iowa

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